Hello,

1. Our “Show single variation” feature display all product variations on the shop page. For example, if you have the following list of variations:
M-green
M-blue
M-red
L-green
L-blue
L-red
Then, you will have 6 different variations shown on the catalog page.

2. Try to disable the “Table usage” option in WooCommerce -> Settings -> Products -> Advanced.

Kind Regards